dino-core
Version:
A dependency injection framework for NodeJS applications
55 lines • 2.38 kB
JavaScript
;
// Copyright 2021 Quirino Brizi [quirino.brizi@gmail.com]
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
Object.defineProperty(exports, "__esModule", { value: true });
exports.DependencyExtractor = void 0;
const STRIP_COMMENTS_REGEX = /((\/\/.*$)|(\/\*[\s\S]*?\*\/))/gm;
const ARGUMENT_NAMES_REGEX = /([^\s,]+)/g;
const STRIP_PROXY_REGEX = /[\s{\s}\s]/gm;
class DependencyExtractor {
/**
* Extract dependencies for the provided class if any
* @param {Object} clazz the class the dependencies should be extracted for
*
* @returns {Array}
* @public
*/
extractDependenciesFor(clazz) {
let currentLevel = clazz;
const answer = [];
let definition = currentLevel.toString().replace(STRIP_COMMENTS_REGEX, '');
while (definition.includes('extends') && !definition.includes('constructor')) {
// update chain level
// eslint-disable-next-line no-proto
currentLevel = currentLevel.__proto__;
// get new definition
definition = currentLevel.toString().replace(STRIP_COMMENTS_REGEX, '');
}
while (definition.includes('constructor')) {
answer.push(...this.getArguments(definition));
// update chain level
// eslint-disable-next-line no-proto
currentLevel = currentLevel.__proto__;
// get new definition
definition = currentLevel.toString().replace(STRIP_COMMENTS_REGEX, '');
}
return answer;
}
getArguments(definition) {
const argumentList = definition.slice(definition.indexOf('(') + 1, definition.indexOf(')'));
return argumentList.replace(STRIP_PROXY_REGEX, '').match(ARGUMENT_NAMES_REGEX) ?? [];
}
}
exports.DependencyExtractor = DependencyExtractor;
//# sourceMappingURL=DependencyExtractor.js.map